Garden Pests and Diseases: Is this guy evil?, 1 by JessJess

JessJess wrote:
I have some aphids on my pepper plants. It's a work in process. I've tried using some Natria http://www.bayeradvanced.com/find-a-product/insects-pests/na... which hasn't really done any good. I've tried washing each of my leaves with soap and water which... sort of helped? And every morning I go out and mush them. Lady bugs, here I come.

I was committing my standard aphid genocide this morning, and happened to see this little guy (about an inch from my thumb. Eek). I have no idea what it is, if it's a good bug or a bad bug, and I didn't know whether to squish it or let it live. Pending identification, I've let it live. I hope it's here to eat my aphids, not breed a population of evil garden-destroying pests.

But I can't find it. No idea what it is. Please help? It's white with white and brown striped horns, six legs. Vaguely beetle shaped. And about 3/16ths of an inch long.